[INFO] updating cached repository lyuha/bf.rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lyuha/bf.rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lyuha/bf.rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/lyuha/bf.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lyuha/bf.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lyuha/bf.rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lyuha/bf.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lyuha/bf.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 03b57f10caecac14eef9f5a8831065952e6f9c25
[INFO] sha for GitHub repo lyuha/bf.rs: 03b57f10caecac14eef9f5a8831065952e6f9c25
[INFO] validating manifest of lyuha/bf.rs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lyuha/bf.rs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lyuha/bf.rs
[INFO] finished frobbing lyuha/bf.rs
[INFO] frobbed toml for lyuha/bf.rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/lyuha/bf.rs/Cargo.toml
[INFO] started frobbing lyuha/bf.rs
[INFO] finished frobbing lyuha/bf.rs
[INFO] frobbed toml for lyuha/bf.rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lyuha/bf.rs/Cargo.toml
[INFO] crate lyuha/bf.rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing lyuha/bf.rs against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lyuha/bf.rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 383e2f4575f36966a3425d9cd189f1d961cab8708fdc31899315e951323abc44
[INFO] running `"docker" "start" "-a" "383e2f4575f36966a3425d9cd189f1d961cab8708fdc31899315e951323abc44"`
[INFO] [stderr]    Compiling bf_rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:15:24
[INFO] [stderr]    |
[INFO] [stderr] 15 |             if let Err(e) = f.read_to_string(&mut buffer) {
[INFO] [stderr]    |                        ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.37s
[INFO] running `"docker" "inspect" "383e2f4575f36966a3425d9cd189f1d961cab8708fdc31899315e951323abc44"`
[INFO] running `"docker" "rm" "-f" "383e2f4575f36966a3425d9cd189f1d961cab8708fdc31899315e951323abc44"`
[INFO] [stdout] 383e2f4575f36966a3425d9cd189f1d961cab8708fdc31899315e951323abc44
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lyuha/bf.rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 84fc05fd6377b0c46e075c90bd6a15dc0fe1c64384cdb3d035240538ddc52613
[INFO] running `"docker" "start" "-a" "84fc05fd6377b0c46e075c90bd6a15dc0fe1c64384cdb3d035240538ddc52613"`
[INFO] [stderr]    Compiling bf_rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/main.rs:15:24
[INFO] [stderr]    |
[INFO] [stderr] 15 |             if let Err(e) = f.read_to_string(&mut buffer) {
[INFO] [stderr]    |                        ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `"docker" "inspect" "84fc05fd6377b0c46e075c90bd6a15dc0fe1c64384cdb3d035240538ddc52613"`
[INFO] running `"docker" "rm" "-f" "84fc05fd6377b0c46e075c90bd6a15dc0fe1c64384cdb3d035240538ddc52613"`
[INFO] [stdout] 84fc05fd6377b0c46e075c90bd6a15dc0fe1c64384cdb3d035240538ddc52613
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lyuha/bf.rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 585fe20fc1fe1d326506c1d33939624fd3b4360cddf7b8c196f0bf19f7870953
[INFO] running `"docker" "start" "-a" "585fe20fc1fe1d326506c1d33939624fd3b4360cddf7b8c196f0bf19f7870953"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/bf_rs-abd9d4420eb7889c
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "585fe20fc1fe1d326506c1d33939624fd3b4360cddf7b8c196f0bf19f7870953"`
[INFO] running `"docker" "rm" "-f" "585fe20fc1fe1d326506c1d33939624fd3b4360cddf7b8c196f0bf19f7870953"`
[INFO] [stdout] 585fe20fc1fe1d326506c1d33939624fd3b4360cddf7b8c196f0bf19f7870953